Initial release: ESP32-C3 CO2 & environment sensor board

KiCad 10 design (schematic, 2-layer layout, custom symbols and footprints),
fabrication data for PCBWay (Gerber X2, Excellon, job file), BOM, generated
documentation (schematic PDF, layer plots, 3D render) and firmware notes.

gerber/esp+sensair-B_Silkscreen.gbr

@@ -0,0 +1,15 @@
+G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,10.0.6*
+G04 #@! TF.CreationDate,2026-09-08T00:42:25+02:00*
+G04 #@! TF.ProjectId,esp+sensair,6573702b-7365-46e7-9361-69722e6b6963,rev?*
+G04 #@! TF.SameCoordinates,Original*
+G04 #@! TF.FileFunction,Legend,Bot*
+G04 #@! TF.FilePolarity,Positive*
+%FSLAX46Y46*%
+G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
+G04 Created by KiCad (PCBNEW 10.0.6) date 2026-09-08 00:42:25*
+%MOMM*%
+%LPD*%
+G01*
+G04 APERTURE LIST*
+G04 APERTURE END LIST*
+M02*